Authorities have admitted they are concerned an active terror cell is operating in NY and NJ

Five people were apprehended on the Belt Parkway in Brooklyn near to New York's Verrazano Bridge

They were heavily armed according to the FBI who also said they discovered bomb making equipment

Police and FBI said that three pipe bombs and two smaller explosive devices were found in Elizabeth, NJ

All Amtrak and NJTransit trains were being held in Penn Station in Manhattan after the discovery at station

The pipe bombs in New Jersey used flip phone timers and as did pressure-cooker device found in Chelsea

It's believed the home-made bomb that exploded also used old-school flip phone as a detonator

Device found in Elizabeth is similar in appearance to device found in Seaside Park, NJ

Believed that the metal dumpster the bomb was placed in prevented loss of life in Manhattan

CNN have obtained video that shows the same man at 23rd and 27th streets - where the bombs were left

Another two men are seen on video removing the pressure cooker from a duffel bag on 27th Street

A bomb was detonated by a police robot at a New Jersey station on Sunday night as the FBI conducts a manhunt for a suspected terrorist cell behind the Manhattan bomb blast on Saturday night.Footage from the scene showed the robot accidentally cut the wrong wire on one of five IEDs dumped in a trashcan at the train station in Elizabeth, New Jersey late on Sunday night, resulting in a huge explosion.Hours earlier, the FBI stopped an SUV with five armed men inside on New York’s Verrazano bridge in connection with Saturday’s Manhattan bomb. They are currently questioning those men, who were believed to be on their way to the airport when they were stopped, but say there could be more suspects at large and a terror cell may exist in the area. Officials have suggested that all or most of the arrested men are from the same family.It was the second night of suspected terrorism in the New York area, after a bomb exploded in Chelsea hurting 29 people and a second device was found and defused on Saturday night. A military fun run was also pipe bombed in New Jersey on Saturday.Officers at Elizabeth train station were startled by the huge bang that erupted without warning just before 1am on Monday morning when the bomb squad robot cut the wrong wire on one of five devices - causing it to explode. Authorities said the loss of life 'could have been enormous' with the device discovered at a spot where, just hours later, thousands of passengers would ordinarily be gathering for their morning commute. While there was no immediate sign of damage to the station, authorities warned the public there may be more detonations through the night as they attempt to diffuse the remaining IEDs. Authorities raised the frightening possibility that an active terror cell was currently in the midst of unleashing attacks across New Jersey and New York and around 9.30pm when two men discovered up to five suspect packages in the trash and alerted the police.